Table 3-15
the Following Table Contains Some Production Possibilities for an Economy

Table 3-15
The following table contains some production possibilities for an economy for a given month. $$\begin{array} { | c | c | } \hline \text { Bragel: } & \text { Donut: } \\\hline 40 & 150 \\\hline \text { 60 } & ? \\\hline \text { 80 } & 50 \\\hline\end{array}$$
-Refer to Table 3-15. If the production possibilities frontier is a straight line, then "?" must be

A) 50.
B) 75.
C) 100.
D) 125.